Question

Give general charachers of phylum chordata and classify labeo with reasons.

Answer 1

General characteristics of phylum CHORDATA are :-
* They are triploblastic.
* Bilaterally symmetrical.
* Exchange of gases take place through gills, lungs and skin.
* Closed circulatory system.
* Pair of kidneys are present which helps in excretion.
* Segmentation is present.
* They have pair of find and limbs.
* They are viviparous.
* Sexes are not separated.
* Fertilization is internal and development is direct.
* Heart is four cheambered.
* Ex :- dog, cat, rat, elephant etc.

LABEO :-
* It is a fish. It's general name is rohu.
* Gills are present for respiration.
* It belongs to CHORDATA phylum.
* It lives in frsh water.
* Carthage and bones are also present in it.


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